Chair ring



FIG. 1 is a perspective view of a chair ring showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof (the left side being a mirror image thereof);

FIG. 5 is a top plan view; and,

FIG. 6 is a bottom plan view.

The broken line portions of the drawings form no part of the claimed design. 

The ornamental design for a chair ring, as shown and described. 